JPH02135779U - - Google Patents
Info
- Publication number
- JPH02135779U JPH02135779U JP4440689U JP4440689U JPH02135779U JP H02135779 U JPH02135779 U JP H02135779U JP 4440689 U JP4440689 U JP 4440689U JP 4440689 U JP4440689 U JP 4440689U JP H02135779 U JPH02135779 U JP H02135779U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pilot
- switching
- directional
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010720 hydraulic oil Substances 0.000 claims 2
- 239000003921 oil Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Driven Valves (AREA)
Description
図面は本考案に係る作業車の油圧アクチユエー
タ操作構造の実施例を示し、第1図は方向切欠弁
及びパイロツト弁の縦断正面図、第2図は方向切
換弁のスプールが一方のストロークエンド付近に
達した状態を示す部分拡大断面図、第3図はバツ
クホウの油圧回路図、第4図はバツクホウにおけ
るエンジンルームの横断平面図、第5図はバツク
ホウの全体側面図、第6図は第1別実施例におけ
る方向切換弁のスプール端部付近の縦断正面図、
第7図は第2別実施例における方向切換弁のスプ
ール端部付近の縦断正面図である。
3……流量制御機構、11……方向切換弁、1
1b……方向切換弁のスプール、11d,11e
……方向切換弁のパイロツト油室、11f,11
g,22b……絞り部、13……油圧アクチユエ
ータ、14……人為操作具、15a,15b……
排油路、16……パイロツト弁。
The drawings show an embodiment of the hydraulic actuator operation structure for a working vehicle according to the present invention, in which Fig. 1 is a longitudinal sectional front view of a directional valve and a pilot valve, and Fig. 2 shows a state in which the spool of the directional valve is near one stroke end. Figure 3 is a hydraulic circuit diagram of the backhoe, Figure 4 is a cross-sectional plan view of the engine room in the backhoe, Figure 5 is an overall side view of the backhoe, and Figure 6 is a partial view of the backhoe. A longitudinal sectional front view of the vicinity of the spool end of the directional control valve in the example,
FIG. 7 is a longitudinal sectional front view of the vicinity of the spool end of the directional control valve in the second alternative embodiment. 3...Flow control mechanism, 11...Directional switching valve, 1
1b... Directional switching valve spool, 11d, 11e
...Pilot oil chamber of directional valve, 11f, 11
g, 22b... throttle section, 13... hydraulic actuator, 14... human operating tool, 15a, 15b...
Oil drain path, 16...pilot valve.
Claims (1)
方向を切換操作するパイロツト操作式の方向切換
弁11と、流量制御機構3とを直列に接続し、前
記方向切換弁11に対して切換操作用のパイロツ
ト作動油を給排操作するパイロツト弁16と、こ
のバイロツト弁16を切換操作する人為操作具1
4とを備えた作業車の油圧アクチユエータ操作構
造であつて、前記方向切換弁11のスプール11
bがそのストロークエンドの手前設定位置からス
トロークエンドに至る間にのみ機能する絞り部1
1f,11g,22bを、パイロツト油室11d
,11eと排油路15a,15bとの間に設けて
ある作業車の油圧アクチユエータ操作構造。 A pilot-operated directional switching valve 11 for switching the supply and discharge direction of hydraulic oil to the hydraulic actuator 13 and the flow control mechanism 3 are connected in series, and a pilot-operated directional switching valve 11 for switching operation for the directional switching valve 11 is connected in series. A pilot valve 16 for supplying and discharging hydraulic oil, and a human operating tool 1 for switching the pilot valve 16
4, the spool 11 of the directional control valve 11
A throttle part 1 that functions only while b reaches the stroke end from the set position before the stroke end.
1f, 11g, 22b, pilot oil chamber 11d
, 11e and the oil drain passages 15a, 15b.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4440689U JPH02135779U (en) | 1989-04-15 | 1989-04-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4440689U JPH02135779U (en) | 1989-04-15 | 1989-04-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02135779U true JPH02135779U (en) | 1990-11-13 |
Family
ID=31557679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4440689U Pending JPH02135779U (en) | 1989-04-15 | 1989-04-15 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02135779U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998003739A1 (en) * | 1996-07-19 | 1998-01-29 | Komatsu Ltd. | Device for reducing a shock at a stroke end of a 2-piece boom type construction machine |
-
1989
- 1989-04-15 JP JP4440689U patent/JPH02135779U/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998003739A1 (en) * | 1996-07-19 | 1998-01-29 | Komatsu Ltd. | Device for reducing a shock at a stroke end of a 2-piece boom type construction machine |